AT&T Plant Series - Tables and Connections; Table B: Key System Conversions; Table C: AC1 Wall Base 2-Party Service; Table D: AD1 Desk Base 2-Party Service

I
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TABLE B
CONVERSION FOR USE WITH 1A1,
1A2 , AND 6A KTS
TERMINAL BOARD
LEAD
COLOR
FROM
TO
BR c
G
Line
s
A
L2
Switch
y
L2
3
I
A Cl BK
Ll c
Ringer
ADl BK G
c
I
Mtg Cord
R
L2
i
c
or IW
Capacitor
BK
I
A
Ll
Strap
TABLE C
ACl (WALL} TELEPHONE BASE CONNECTIONS FOR
2-PARTY SERVICE
TIP PARTY
1-- ----- --- --- -
WIRE OR
RING
NO
WITH
COLOR
PARTY
IDENT
LEAD
IDENT
GROUND
GROUND
(NOTE
1)
Ring
R
L2
Ll
Ll
~ --- ··------ I---- ·
...
.._ _____
Inside
Tip G Ll L2
L2
----··-
--·-- -
~- -·- ··---··-
-- .
Wire
GRD
y
3 3
3
-·---- · ---- - --
TRNSF
BK
1 1
1
'
R
K K K
Ringer
-- ·-
. ..
·- -- -·-
Leads
BK
3 3 3
-- -·-
(Note
2)
·-
--
BL
B B B
Handset
Co rd
R
c
F F
Jack
,___
--
I--- ----·
G F c c
Notes:
1. Same connections used for either 1000 or 2650 ohm
Central Offices. For tip party identifying ground -
lOOOn or 2650!1 H5AA cord must be used.
2. To permanently silence ringer; move ( R) ringer lead
from K to G on terminal board. For tip party identi-
fication (BK) ringer le ad must remain on G of
terminal board.
* Disconnect (BL) lead from terminal B wh en H5AA cord
is used and tip identifying ground is not provided, in-
sulate or store on unused terminal.
ISS 1, SECTION 502-304-101
TABLE D
ADl (DESK} TELEPHONE BASE CONNECTIONS FOR
2-PARTY SERVICE
TIP PARTY
WIRE OR
RING
NO
WITH
COLOR
PARTY
IDENT
LEAD
IDENT
GROUND
GROUND
(NOTE 1)
Ring
R
R
R R
Inside
Tip
G G
G G
Wire at
GRD
y y
y
y
Conn
---· ·- ----
Block
R
y
y y
TRNSF
f---. --
·- I- - -- -····
G
B
B B
R R
G G
>--- ·
-·
Mtg
G G
R
R
Cord
------
- --- ---··
at
y y
y
y
Conn
-- ·- - -
..
Block
BK B
B
B
·-
w
y
y
y
R
L2
L2
L2
-
-
Mtg
G
Ll
Ll
Ll
Cord
f---
-- ----
~--
...
in
y
G
G
G
Tel
- ~ - -- ·
Base
BK 1
1
1
~-- --·
---
~ - -
--
w
3
3
3
R K
K
K
Ringer
Leads
BK
G
G G
(Note 2)
---·
---
BL B
B
B
Handset
Co rd
R
c F F
Jack
G
F
c
c
Notes:
1. Same c onnections used for either 1000 or 2650 ohm
Central Offices. For tip party identifying ground -
1000
!1 or 2650fl H 5AA cord must be used.
2. To permanently silence ringer ; move (R) ringer
lead from K to G on terminal board. For tip par ty
identification (BK) ringer lead must remain on 3 of
terminal board.
* Disconnect (BL) lead from te rminal B when H5AA cord
is used and tip identifying ground is not provided ,
insulate or store on unu sed terminal.
Page 13
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